So called "ingeniousness"

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"Madame Grand was known for her striking Nordic beauty, as well as her ingenuous public comments." [1]

"Ingenious" is used satirically in the source materially, not in a literal sense.

″This "belle indolente," although not stupid - she was after all shrewd enough to ensnare the brilliant Talleyrand - was renowned for her child-like beauty and the ingenuousness of her public utterances. When asked where she was from, she would respond naively, "je suis d'Inde" (I am from India), but the phrase could be, and was often, construed as "je suis dinde" (I am a turkey).″ [2]

The article goes on to tell another story in which she mistakenly presumes Napoleon is Robinson Crusoe.

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